97 lines
2.4 KiB
C
97 lines
2.4 KiB
C
/*************************************************************************\
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* Copyright (c) 2008 UChicago Argonne LLC, as Operator of Argonne
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* National Laboratory.
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* Copyright (c) 2002 The Regents of the University of California, as
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* Operator of Los Alamos National Laboratory.
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* EPICS BASE is distributed subject to a Software License Agreement found
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* in file LICENSE that is included with this distribution.
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\*************************************************************************/
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/*
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* Original Authors: Bob Dalesio and Marty Kraimer
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* Date: 3/6/91
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*/
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#include <stdlib.h>
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#include <stdio.h>
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#include <string.h>
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#include "alarm.h"
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#include "dbDefs.h"
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#include "dbAccess.h"
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#include "epicsMath.h"
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#include "recGbl.h"
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#include "devSup.h"
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#include "aiRecord.h"
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#include "epicsExport.h"
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/* Create the dset for devAiSoft */
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static long init_record(aiRecord *prec);
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static long read_ai(aiRecord *prec);
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struct {
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long number;
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DEVSUPFUN report;
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DEVSUPFUN init;
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DEVSUPFUN init_record;
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DEVSUPFUN get_ioint_info;
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DEVSUPFUN read_ai;
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DEVSUPFUN special_linconv;
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} devAiSoft = {
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6,
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NULL,
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NULL,
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init_record,
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NULL,
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read_ai,
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NULL
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};
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epicsExportAddress(dset, devAiSoft);
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static long init_record(aiRecord *prec)
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{
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/* INP must be CONSTANT, PV_LINK, DB_LINK or CA_LINK*/
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switch (prec->inp.type) {
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case CONSTANT:
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if (recGblInitConstantLink(&prec->inp, DBF_DOUBLE, &prec->val))
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prec->udf = FALSE;
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break;
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case PV_LINK:
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case DB_LINK:
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case CA_LINK:
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break;
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default:
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recGblRecordError(S_db_badField, (void *)prec,
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"devAiSoft (init_record) Illegal INP field");
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return S_db_badField;
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}
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return 0;
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}
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static long read_ai(aiRecord *prec)
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{
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double val;
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if (prec->inp.type == CONSTANT)
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return 2;
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if (!dbGetLink(&prec->inp, DBR_DOUBLE, &val, 0, 0)) {
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/* Apply smoothing algorithm */
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if (prec->smoo != 0.0 && prec->dpvt && finite(prec->val))
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prec->val = val * (1.00 - prec->smoo) + (prec->val * prec->smoo);
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else
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prec->val = val;
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prec->udf = FALSE;
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prec->dpvt = &devAiSoft; /* Any non-zero value */
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if (prec->tsel.type == CONSTANT &&
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prec->tse == epicsTimeEventDeviceTime)
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dbGetTimeStamp(&prec->inp, &prec->time);
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} else {
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prec->dpvt = NULL;
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}
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return 2;
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}
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